Maarten Breddels created ARROW-10208:
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             Summary: [C++] comparing list arrays with nulls fails in test 
framework
                 Key: ARROW-10208
                 URL: https://issues.apache.org/jira/browse/ARROW-10208
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
            Reporter: Maarten Breddels


I am not sure if this is a specific test issue or valid behavior, but when 
writing a test in [https://github.com/apache/arrow/pull/8271] 

The following test fails:
{code:java}
this->CheckUnary("split_pattern", R"(["foo bar", "foo", null])", 
list(this->type()),  //                  R"([["foo", "bar"], ["foo"], null])", 
&options);
{code}
with the following output
{code:java}
Failed:
Got: 
  [
    [
      [
        "foo",
        "bar"
      ]
    ],
    [
      [
        "foo"
      ],
      null
    ]
  ]
Expected: 
  [
    [
      [
        "foo",
        "bar"
      ]
    ],
    [
      [
        "foo"
      ],
      null
    ]
  ]
{code}
while the outputs are the same, the arrays are seen as unequal.



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